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A unit tangent vector at t=2 on the curv...

A unit tangent vector at t=2 on the curve `x=t^(2)+2, y=4t-5` and `z=2t^(2)-6t` is

A

`1/sqrt(3) (hati + hatj + hatk)`

B

`1/3(2hati + 2hatj + hatk)`

C

`1/sqrt(6)(2hati + 2hatj + 2hatk)`

D

None of these

Text Solution

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The correct Answer is:
B
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